// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
#ifndef __DETECTOR_H__
#define __DETECTOR_H__

/*
 *  Detector.h
 *  zxing
 *
 *  Copyright 2010 ZXing authors All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <zxing/common/Counted.h>
#include <zxing/common/DetectorResult.h>
#include <zxing/common/BitMatrix.h>
#include <zxing/qrcode/detector/AlignmentPattern.h>
#include <zxing/common/PerspectiveTransform.h>
#include <zxing/ResultPointCallback.h>
#include <zxing/qrcode/detector/FinderPatternInfo.h>

namespace zxing {

    class DecodeHints;

    namespace qrcode {

        class Detector : public Counted {
        private:
            Ref<BitMatrix> image_;
            Ref<ResultPointCallback> callback_;

        protected:
            Ref<BitMatrix> getImage() const;

            Ref<ResultPointCallback> getResultPointCallback() const;

            static Ref<BitMatrix> sampleGrid(Ref<BitMatrix> image, int dimension,
                                             Ref<PerspectiveTransform>);

            static int computeDimension(Ref<ResultPoint> topLeft, Ref<ResultPoint> topRight,
                                        Ref<ResultPoint> bottomLeft,
                                        float moduleSize);

            float calculateModuleSize(Ref<ResultPoint> topLeft, Ref<ResultPoint> topRight,
                                      Ref<ResultPoint> bottomLeft);

            float calculateModuleSizeOneWay(Ref<ResultPoint> pattern,
                                            Ref<ResultPoint> otherPattern);

            float sizeOfBlackWhiteBlackRunBothWays(int fromX, int fromY, int toX, int toY);

            float sizeOfBlackWhiteBlackRun(int fromX, int fromY, int toX, int toY);

            Ref<AlignmentPattern> findAlignmentInRegion(float overallEstModuleSize,
                                                        int estAlignmentX, int estAlignmentY,
                                                        float allowanceFactor);

            Ref<DetectorResult> processFinderPatternInfo(Ref<FinderPatternInfo> info);

        public:
            virtual Ref<PerspectiveTransform> createTransform(Ref<ResultPoint> topLeft,
                                                              Ref<ResultPoint> topRight, Ref<
                    ResultPoint> bottomLeft, Ref<ResultPoint> alignmentPattern, int dimension);

            Detector(Ref<BitMatrix> image);

            Ref<DetectorResult> detect(DecodeHints const &hints);


        };
    }
}

#endif // __DETECTOR_H__
